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<li class="navelem"><a class="el" href="../../dir_68267d1309a1af8e8297ef4c3efbcdba.html">src</a></li>  </ul>
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  <div class="headertitle"><div class="title">ringbuff.cpp</div></div>
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<a href="../../de/daa/ringbuff_8cpp.html">浏览该文件的文档.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="preprocessor">#if !defined( __GNUC__ )</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="preprocessor">#    error &quot;[ ERROR ]    This module must complied by GCC&quot;</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span> </div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="preprocessor">#include &lt;assert.h&gt;</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="preprocessor">#include &lt;string.h&gt;</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="preprocessor">#include &lt;memory.h&gt;</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="preprocessor">#include &lt;mutex&gt;</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span> </div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="preprocessor">#include &quot;<a class="code" href="../../d4/da3/ringbuff_8hpp.html">ringbuff.hpp</a>&quot;</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="keyword">using namespace </span><a class="code hl_namespace" href="../../df/d8d/namespacewheels.html">wheels</a>;</div>
<div class="foldopen" id="foldopen00012" data-start="{" data-end="}">
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"><a class="line" href="../../d1/db2/classwheels_1_1rb.html#abd5c03132a045aacc6ee8ef8ebc75491">   12</a></span>rb :: rb( <span class="keywordtype">size_t</span> size , <span class="keywordtype">bool</span> autoZero )</div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span>    : __p_data( NULL ),</div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span>      __m_maxSize( size ),</div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span>      __m_curr_len( 0 ),</div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span>      __m_curr_add_point( 0 ),</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span>      __m_curr_get_point( 0 )</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span>{</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span>    __p_data = malloc( size );</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span>    <span class="keywordflow">if</span>( NULL == __p_data ){</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span>        <span class="keywordflow">throw</span> <a class="code hl_enumvalue" href="../../d1/db2/classwheels_1_1rb.html#a43fba1cafe0f21ade8ab93f284b84843adc8ce530ea6f636cb03be0af6e84ee0f">ERR_ALLOC_MEM</a>;</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span>    }</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span> </div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span>    <span class="keywordflow">if</span>( autoZero ){</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span>        memset( __p_data , 0 , size );</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span>    }</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span>}</div>
</div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span> </div>
<div class="foldopen" id="foldopen00029" data-start="{" data-end="}">
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"><a class="line" href="../../d1/db2/classwheels_1_1rb.html#a4c5419a63fd69b606f0df507d49e554a">   29</a></span>rb :: rb( <span class="keyword">const</span> <a class="code hl_class" href="../../d1/db2/classwheels_1_1rb.html">rb</a>&amp; b )</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span>    : __p_data( NULL ),</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span>      __m_maxSize( b.__m_maxSize ),</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span>      __m_curr_len( 0 ),</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span>      __m_curr_add_point( 0 ),</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span>      __m_curr_get_point( 0 )</div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span>{</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span>    <a class="code hl_class" href="../../d1/db2/classwheels_1_1rb.html">rb</a> * p_b = ( <a class="code hl_class" href="../../d1/db2/classwheels_1_1rb.html">rb</a>*)&amp;b;</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span> </div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span>    __p_data = malloc( p_b-&gt;__m_maxSize );</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span>    <span class="keywordflow">if</span>( NULL == __p_data ){</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span>        <span class="keywordflow">throw</span> <a class="code hl_enumvalue" href="../../d1/db2/classwheels_1_1rb.html#a43fba1cafe0f21ade8ab93f284b84843adc8ce530ea6f636cb03be0af6e84ee0f">ERR_ALLOC_MEM</a>;</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span>    }</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span> </div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span>    __m_maxSize        = p_b-&gt;__m_maxSize;</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span>    memcpy( __p_data , p_b-&gt;__p_data , __m_maxSize );</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span> </div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span>    __m_curr_len       = p_b-&gt;__m_curr_len;</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span>    __m_curr_add_point = p_b-&gt;__m_curr_add_point;</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span>    __m_curr_get_point = p_b-&gt;__m_curr_get_point;</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span> </div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span>}</div>
</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span> </div>
<div class="foldopen" id="foldopen00052" data-start="{" data-end="}">
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"><a class="line" href="../../d1/db2/classwheels_1_1rb.html#aecb50e4991fcfd79900e0ec2a03f0aa9">   52</a></span>rb :: ~rb()</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span>{</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>    std::lock_guard&lt;std::mutex&gt; l( __m_mutex );</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>    <span class="keywordflow">if</span>( __p_data ) free( __p_data );</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>}</div>
</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span> </div>
<div class="foldopen" id="foldopen00058" data-start="{" data-end="}">
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"><a class="line" href="../../d1/db2/classwheels_1_1rb.html#a52eaddee8ef54c672443f211eada463c">   58</a></span><a class="code hl_class" href="../../d1/db2/classwheels_1_1rb.html">rb</a>&amp; rb :: operator=( <span class="keyword">const</span> <a class="code hl_class" href="../../d1/db2/classwheels_1_1rb.html">rb</a>&amp; b )</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>{</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>    <a class="code hl_class" href="../../d1/db2/classwheels_1_1rb.html">rb</a> * p_b = ( <a class="code hl_class" href="../../d1/db2/classwheels_1_1rb.html">rb</a>*)&amp;b;</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>    std::lock_guard&lt;std::mutex&gt; l( __m_mutex );</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span> </div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>    __p_data = malloc( p_b-&gt;__m_maxSize );</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span>    <span class="keywordflow">if</span>( NULL == __p_data ){</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span>        <span class="keywordflow">throw</span> ERR_ALLOC_MEM;</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span>    }</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span> </div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span>    __m_maxSize = p_b-&gt;__m_maxSize;</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>    memcpy( __p_data , p_b-&gt;__p_data , __m_maxSize );</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span> </div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>    __m_curr_len       = p_b-&gt;__m_curr_len;</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>    __m_curr_add_point = p_b-&gt;__m_curr_add_point;</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>    __m_curr_get_point = p_b-&gt;__m_curr_get_point;</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span> </div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span> </div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span>    <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>}</div>
</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span> </div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span>rb :: emErrCode</div>
<div class="foldopen" id="foldopen00080" data-start="{" data-end="}">
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"><a class="line" href="../../d1/db2/classwheels_1_1rb.html#a91a3740b9c0aed89cb704cccb84269d9">   80</a></span>rb :: append( <span class="keyword">const</span> <span class="keywordtype">void</span> * __data , <span class="keywordtype">size_t</span> size )</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>{</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span>    <a class="code hl_enumeration" href="../../d1/db2/classwheels_1_1rb.html#a43fba1cafe0f21ade8ab93f284b84843">emErrCode</a> ret = OK;</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span> </div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span>    <span class="keywordflow">if</span>( NULL == __data ){<span class="keywordflow">return</span> ERR_SRC_NULL;}</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span>    <span class="keywordflow">if</span>( NULL == __p_data ) <span class="keywordflow">return</span> ERR_DATA_NULL;</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span> </div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span>    <span class="keywordtype">char</span> * data = ( <span class="keywordtype">char</span> *)__data;</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span>    <span class="keywordtype">char</span> * p_data = ( <span class="keywordtype">char</span> *)__p_data;</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span> </div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>    std::lock_guard&lt;std::mutex&gt; l( __m_mutex );</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>    <span class="keywordflow">if</span>( __m_curr_add_point + size &lt;= __m_maxSize ){</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span>        memcpy( p_data + __m_curr_add_point , data , size );</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span> </div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>        __m_curr_len += size;</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span>        __m_curr_add_point += size;</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span>    }<span class="keywordflow">else</span>{</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span>        <span class="comment">// 计算后段位置</span></div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span>        <span class="keywordtype">size_t</span> bk_pos = __m_maxSize - __m_curr_add_point;</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>        <span class="comment">// 拷贝前段</span></div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span>        memcpy( p_data + __m_curr_add_point , data , bk_pos );</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span>        <span class="comment">// 拷贝后段落.</span></div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span>        memcpy( p_data , data + bk_pos , size - bk_pos );</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span> </div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span>        __m_curr_add_point = size - bk_pos;</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span>        __m_curr_len += size;</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span> </div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span>    }</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span> </div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span>    <span class="keywordflow">if</span>( __m_curr_len &gt; __m_maxSize ) __m_curr_len = __m_maxSize;</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span> </div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>    <span class="keywordflow">return</span> ret;</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span>}</div>
</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span> </div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span>rb :: emErrCode</div>
<div class="foldopen" id="foldopen00116" data-start="{" data-end="}">
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"><a class="line" href="../../d1/db2/classwheels_1_1rb.html#ab572d952c783d952a2b0756131ce931b">  116</a></span>rb :: get( <span class="keywordtype">void</span> * __data , <span class="keywordtype">size_t</span> size )</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span>{</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>    <a class="code hl_enumeration" href="../../d1/db2/classwheels_1_1rb.html#a43fba1cafe0f21ade8ab93f284b84843">emErrCode</a> ret = OK;</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>    <span class="keywordflow">if</span>( __data == NULL ) <span class="keywordflow">return</span> ERR_DST_NULL;</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span>    <span class="keywordtype">char</span> * data = ( <span class="keywordtype">char</span> *)__data;</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span>    <span class="keywordtype">char</span> * p_data = ( <span class="keywordtype">char</span> *)__p_data;</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span>    std::lock_guard&lt;std::mutex&gt; l( __m_mutex );</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span>    <span class="keywordflow">if</span>( size &lt;= __m_curr_len ){</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>        <span class="keywordflow">if</span>( __m_curr_get_point + size &lt; __m_maxSize ){</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span>            memcpy( data , p_data + __m_curr_get_point , size );</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span> </div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span>            __m_curr_get_point += size;</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span>            __m_curr_len -= size;</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span>        }<span class="keywordflow">else</span>{</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span>            <span class="keywordtype">size_t</span> sec_ph = __m_maxSize - __m_curr_get_point;</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span> </div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>            memcpy( data , p_data + __m_curr_get_point , sec_ph );</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span>            memcpy( data + sec_ph , __p_data , size - sec_ph );</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span> </div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span>            __m_curr_get_point = size - sec_ph;</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span>            __m_curr_len -= size;</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span>        }</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span>    }<span class="keywordflow">else</span>{</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span>        <span class="keywordflow">return</span> ERR_LESS_DATA;</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span>    }</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span> </div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span>    <span class="keywordflow">return</span> ret;</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span>}</div>
</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span> </div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span><a class="code hl_enumeration" href="../../d1/db2/classwheels_1_1rb.html#a43fba1cafe0f21ade8ab93f284b84843">rb::emErrCode</a></div>
<div class="foldopen" id="foldopen00146" data-start="{" data-end="}">
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"><a class="line" href="../../d1/db2/classwheels_1_1rb.html#af5bbd0d1d75ef73284516de6995b3520">  146</a></span>rb :: get( <span class="keywordtype">void</span> * __data , <span class="keywordtype">size_t</span> pos , <span class="keywordtype">size_t</span> size )</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>{</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span>    <a class="code hl_enumeration" href="../../d1/db2/classwheels_1_1rb.html#a43fba1cafe0f21ade8ab93f284b84843">emErrCode</a> ret = OK;</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span>    <span class="keywordflow">if</span>( __data == NULL ) <span class="keywordflow">return</span> ERR_DST_NULL;</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span>    <span class="keywordtype">char</span> * data = ( <span class="keywordtype">char</span> *)__data;</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span>    <span class="keywordtype">char</span> * p_data = ( <span class="keywordtype">char</span> *)__p_data;</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span>    std::lock_guard&lt;std::mutex&gt; l( __m_mutex );</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span>    <span class="keywordtype">size_t</span> data_end = __m_curr_get_point + __m_curr_len;</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span>    <span class="keywordflow">if</span>( data_end &gt;= __m_maxSize ){</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span>        data_end = __m_maxSize;</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span>    }</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span> </div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span>    <span class="keywordflow">if</span>( size + pos &lt; __m_curr_len ){ <span class="comment">// 数据没有跨过存储位置的尾部</span></div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span>        <span class="keywordflow">if</span>( __m_curr_get_point + size + pos &lt; __m_maxSize ){</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span>            memcpy( data , p_data + __m_curr_get_point + pos, size );</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span> </div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span>            __m_curr_get_point += size;</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span>        }<span class="keywordflow">else</span>{ <span class="comment">// 数据跨过了尾部，则需要分成两种情况来看，第一是取数据位置没有跨过，但是加上数据长度后跨过了</span></div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span>            <span class="keywordflow">if</span>( __m_curr_get_point + pos &lt; __m_maxSize ){</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span>                <span class="keywordtype">size_t</span> sec_ph = __m_maxSize - __m_curr_get_point - pos;</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span> </div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span>                memcpy( data , p_data + __m_curr_get_point + pos , sec_ph );</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span>                memcpy( data + sec_ph , __p_data , size - sec_ph );</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span> </div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span>                <span class="comment">// 调整下次取数据的位置</span></div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span>                __m_curr_get_point = size-sec_ph;</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span>            }<span class="keywordflow">else</span>{<span class="comment">// 第二种是取数据的位置跨过了</span></div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span>                <span class="keywordtype">size_t</span> real_pos = __m_curr_get_point + pos - __m_maxSize;</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span> </div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span>                memcpy( data , p_data + real_pos , size );</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span> </div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span>                __m_curr_get_point = real_pos + size;</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span>            }</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span>        }</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span> </div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span>        __m_curr_len -= size;</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span>    }<span class="keywordflow">else</span>{</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span>        <span class="keywordflow">return</span> ERR_LESS_DATA;</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span>    }</div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span> </div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span>    <span class="keywordflow">return</span> ret;</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span>}</div>
</div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span> </div>
<div class="foldopen" id="foldopen00189" data-start="{" data-end="}">
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"><a class="line" href="../../d1/db2/classwheels_1_1rb.html#a66c13981c71441bf12d0c513971cdb3c">  189</a></span><span class="keywordtype">size_t</span> rb :: length()</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span>{</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span>    <span class="keywordtype">size_t</span> ret = 0;</div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno">  192</span>    std::lock_guard&lt;std::mutex&gt; l( __m_mutex );</div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span>    ret = __m_curr_len;</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span> </div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span>    <span class="keywordflow">return</span> ret;</div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span>}</div>
</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span> </div>
<div class="foldopen" id="foldopen00198" data-start="{" data-end="}">
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"><a class="line" href="../../d1/db2/classwheels_1_1rb.html#aa5c4d9868c17ef09b28f56079b3ec3dd">  198</a></span><span class="keywordtype">void</span> rb :: drop( <span class="keywordtype">size_t</span> size )</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span>{</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span>    std::lock_guard&lt;std::mutex&gt; l( __m_mutex );</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span>    <span class="keywordflow">if</span>( size &gt; __m_curr_len ) clear();</div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span> </div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span>    <span class="keywordflow">if</span>( __m_curr_get_point + size &gt;= __m_maxSize ){</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span>        __m_curr_get_point = __m_curr_get_point + size - __m_maxSize;</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span>    }<span class="keywordflow">else</span>{</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span>        __m_curr_get_point += size;</div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span>    }</div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span> </div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span>    __m_curr_len -= size;</div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span>}</div>
</div>
<div class="foldopen" id="foldopen00211" data-start="{" data-end="}">
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"><a class="line" href="../../d1/db2/classwheels_1_1rb.html#aa68fc1b23adeccb9c5bd190b314f4eef">  211</a></span><span class="keywordtype">void</span> rb :: clear()</div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span>{</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span>    std::lock_guard&lt;std::mutex&gt; l( __m_mutex );</div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span> </div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span>    memset( __p_data , 0 , __m_maxSize );</div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno">  216</span> </div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span>    __m_curr_get_point = 0;</div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span>    __m_curr_add_point = 0;</div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span>    __m_curr_len = 0;</div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span>}</div>
</div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno">  221</span> </div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span>rb :: emErrCode</div>
<div class="foldopen" id="foldopen00223" data-start="{" data-end="}">
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"><a class="line" href="../../d1/db2/classwheels_1_1rb.html#a398f5ebc48098ec601d9814d9bf07b83">  223</a></span>rb :: resize( <span class="keywordtype">size_t</span> size , <span class="keywordtype">bool</span> autoZero  )</div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span>{</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span>    std::lock_guard&lt;std::mutex&gt; l( __m_mutex );</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span> </div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span>    __p_data = realloc( __p_data , size );</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span> </div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno">  229</span>    <span class="keywordflow">if</span>( __p_data == NULL ) <span class="keywordflow">return</span> ERR_ALLOC_MEM;</div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno">  230</span> </div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno">  231</span>    __m_maxSize = size;</div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno">  232</span> </div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno">  233</span>    <span class="keywordflow">if</span>( autoZero ){</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno">  234</span>        memset( __p_data , 0 , __m_maxSize );</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno">  235</span> </div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno">  236</span>        __m_curr_len = 0;</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno">  237</span>        __m_curr_add_point = 0;</div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno">  238</span>        __m_curr_get_point = 0;</div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno">  239</span>    }</div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno">  240</span> </div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno">  241</span>    <span class="keywordflow">return</span> OK;</div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno">  242</span>}</div>
</div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno">  243</span> </div>
<div class="foldopen" id="foldopen00244" data-start="{" data-end="}">
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"><a class="line" href="../../d1/db2/classwheels_1_1rb.html#a0eeb8d036de2d8416bf96ba32d655326">  244</a></span><span class="keywordtype">size_t</span> rb :: index( <span class="keyword">const</span> <span class="keywordtype">void</span> * __data , <span class="keywordtype">size_t</span> len )</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno">  245</span>{</div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno">  246</span>    <span class="keywordtype">size_t</span> ret = (size_t)-1;</div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno">  247</span>    <span class="keyword">const</span> <span class="keywordtype">char</span> * data = ( <span class="keywordtype">char</span> *)__data;</div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno">  248</span>    <span class="keywordtype">char</span> * p_data = ( <span class="keywordtype">char</span> *)__p_data;</div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno">  249</span>    std::lock_guard&lt;std::mutex&gt; l( __m_mutex );</div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno">  250</span> </div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno">  251</span>    <span class="keywordtype">size_t</span> i = __m_curr_get_point , pos = 0;</div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno">  252</span>    <span class="keywordflow">for</span>( ; i &lt; __m_maxSize; ){</div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno">  253</span>        <span class="keywordtype">bool</span> is_find = <span class="keyword">false</span>;</div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno">  254</span> </div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno">  255</span>        __asm__ __volatile__(</div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno">  256</span>            <span class="stringliteral">&quot;1:cmpb %3,(%4)\n&quot;</span>          <span class="comment">// do{ 比较数据</span></div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno">  257</span>            <span class="stringliteral">&quot;je 2f\n&quot;</span>                   <span class="comment">//    如果数据相同执行相关的记录工作</span></div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno">  258</span>            <span class="stringliteral">&quot;inc %4\n&quot;</span>                  <span class="comment">//    增加地址，取下一个数据进行比对</span></div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno">  259</span>            <span class="stringliteral">&quot;dec %2\n&quot;</span>                  <span class="comment">//    否则递减循环计数器</span></div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno">  260</span>            <span class="stringliteral">&quot;jnz 1b\n&quot;</span>                  <span class="comment">//    如果循环计数器不等于0 则继续比对</span></div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno">  261</span>            <span class="stringliteral">&quot;jmp 3f\n&quot;</span>                  <span class="comment">// 循环结束还没有找到，则设置is_find = false, pos = -1;</span></div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno">  262</span>                                        <span class="comment">// }while( count &gt; 0 );</span></div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno">  263</span>            <span class="stringliteral">&quot;2:movb $1, %0\n&quot;</span>           <span class="comment">// 如果比较的字符和模式相同，则is_find=true</span></div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno">  264</span>            <span class="stringliteral">&quot;mov %4, %1\n&quot;</span>              <span class="comment">// 同时记录下来发现的数据位置</span></div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno">  265</span>            <span class="stringliteral">&quot;jmp 4f\n&quot;</span></div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno">  266</span>            <span class="stringliteral">&quot;3:movb $0, %0\n&quot;</span></div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno">  267</span>            <span class="stringliteral">&quot;movl $-1, %1\n&quot;</span></div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno">  268</span>            <span class="stringliteral">&quot;4:\n&quot;</span></div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno">  269</span>            : <span class="stringliteral">&quot;=m&quot;</span> ( is_find ),</div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno">  270</span>              <span class="stringliteral">&quot;=m&quot;</span> ( pos )</div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno">  271</span>            : <span class="stringliteral">&quot;c&quot;</span>  ( __m_curr_len ) ,</div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno">  272</span>              <span class="stringliteral">&quot;a&quot;</span>  ( data[ 0 ] ),</div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno">  273</span>              <span class="stringliteral">&quot;S&quot;</span>  ( p_data + i )</div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno">  274</span>            :<span class="stringliteral">&quot;memory&quot;</span></div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno">  275</span>            );</div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno">  276</span> </div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno">  277</span>        <span class="keywordflow">if</span>( is_find == <span class="keyword">false</span> ){         <span class="comment">// 找不到头数据</span></div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno">  278</span>            <span class="keywordflow">throw</span> ERR_IDX_CAN_NOT_FIND;</div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno">  279</span>        }</div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno">  280</span>        pos = pos - (size_t)p_data;</div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno">  281</span>        i = pos + 1;</div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno">  282</span>        <span class="keywordflow">if</span>( len &gt; 1 ){ <span class="comment">// 如果检索长度超过1个字节在进行内存比对</span></div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno">  283</span>            <span class="keywordflow">if</span>( pos + len &lt; __m_maxSize ){</div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno">  284</span>                <span class="keywordflow">if</span>( memcmp( p_data + pos , data , len ) == 0 ){ <span class="comment">// 找到目标</span></div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno">  285</span>                    ret = pos - __m_curr_get_point;</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno">  286</span>                    <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno">  287</span>                }</div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno">  288</span>            }<span class="keywordflow">else</span> <span class="keywordflow">if</span>( memcmp( p_data + pos , data , __m_maxSize - pos ) == 0 ){ <span class="comment">// 比较前半段</span></div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno">  289</span>                <span class="keywordflow">if</span>( memcmp( p_data + __m_curr_get_point ,</div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno">  290</span>                        data + len - __m_maxSize + pos ,</div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno">  291</span>                        len - __m_maxSize + pos ) == 0 ){ <span class="comment">// 比较后半段</span></div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno">  292</span>                    <span class="keywordflow">if</span>( pos &gt;= __m_curr_get_point )</div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno">  293</span>                        ret = pos - __m_curr_get_point;</div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno">  294</span>                    <span class="keywordflow">else</span>{</div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno">  295</span>                        ret = pos + __m_curr_get_point;</div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno">  296</span>                    }</div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno">  297</span>                    <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno">  298</span>                }</div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno">  299</span>            }<span class="comment">// if( pos + len &lt; __m_maxSize )</span></div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno">  300</span>        }<span class="keywordflow">else</span>{ <span class="comment">// if( len &gt; 1 )</span></div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno">  301</span>            <span class="keywordflow">if</span>( pos &gt;= __m_curr_get_point )</div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno">  302</span>                ret = pos - __m_curr_get_point;</div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno">  303</span>            <span class="keywordflow">else</span>{</div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno">  304</span>                ret = pos + __m_curr_get_point;</div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno">  305</span>            }</div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno">  306</span>            <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno">  307</span>        }</div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno">  308</span>    }</div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno">  309</span>    <span class="keywordflow">if</span>( i &gt;= __m_maxSize ){ <span class="comment">// 没有找到数据</span></div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno">  310</span>        <span class="keywordflow">throw</span> ERR_IDX_CAN_NOT_FIND;</div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno">  311</span>    }</div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno">  312</span> </div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno">  313</span>    <span class="keywordflow">return</span> ret;</div>
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno">  314</span>}</div>
</div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno">  315</span> </div>
<div class="foldopen" id="foldopen00316" data-start="{" data-end="}">
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno"><a class="line" href="../../d1/db2/classwheels_1_1rb.html#a2a51ec140e566e46855b8ec979d8c515">  316</a></span>std::string rb :: errMsg( <a class="code hl_enumeration" href="../../d1/db2/classwheels_1_1rb.html#a43fba1cafe0f21ade8ab93f284b84843">emErrCode</a> e )</div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno">  317</span>{</div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno">  318</span>    std::string ret;</div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno">  319</span>    <span class="keywordflow">switch</span>( e ){</div>
<div class="line"><a id="l00320" name="l00320"></a><span class="lineno">  320</span>    <span class="keywordflow">case</span> ERR_ALLOC_MEM:</div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno">  321</span>        ret = <span class="stringliteral">&quot;内存分配失败&quot;</span>;</div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno">  322</span>    <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno">  323</span>    <span class="keywordflow">case</span> ERR_NO_DATA:</div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno">  324</span>        ret = <span class="stringliteral">&quot;当前缓冲区没有数据&quot;</span>;</div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno">  325</span>        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno">  326</span>    <span class="keywordflow">case</span> ERR_LESS_DATA:</div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno">  327</span>        ret = <span class="stringliteral">&quot;当前数据长度少于请求长度&quot;</span>;</div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno">  328</span>        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno">  329</span>    <span class="keywordflow">case</span> ERR_PTHREAD_MUTEX_INIT:</div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno">  330</span>        ret = <span class="stringliteral">&quot;初始化pthread_mutex错误&quot;</span>;</div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno">  331</span>        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno">  332</span>    <span class="keywordflow">case</span> ERR_SRC_NULL:</div>
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno">  333</span>        ret = <span class="stringliteral">&quot;源数据指针空&quot;</span>;</div>
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno">  334</span>        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno">  335</span>    <span class="keywordflow">case</span> ERR_DST_NULL:</div>
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno">  336</span>        ret = <span class="stringliteral">&quot;目标数据指针空&quot;</span>;</div>
<div class="line"><a id="l00337" name="l00337"></a><span class="lineno">  337</span>        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00338" name="l00338"></a><span class="lineno">  338</span>    <span class="keywordflow">case</span> ERR_DATA_NULL:</div>
<div class="line"><a id="l00339" name="l00339"></a><span class="lineno">  339</span>        ret = <span class="stringliteral">&quot;缓冲区指针空&quot;</span>;</div>
<div class="line"><a id="l00340" name="l00340"></a><span class="lineno">  340</span>        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00341" name="l00341"></a><span class="lineno">  341</span>    <span class="keywordflow">case</span> ERR_IDX_CAN_NOT_FIND:</div>
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno">  342</span>        ret = <span class="stringliteral">&quot;检索数据的时候没有找到内容&quot;</span>;</div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno">  343</span>        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno">  344</span>    <span class="keywordflow">default</span>:<span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno">  345</span>    }</div>
<div class="line"><a id="l00346" name="l00346"></a><span class="lineno">  346</span> </div>
<div class="line"><a id="l00347" name="l00347"></a><span class="lineno">  347</span>    <span class="keywordflow">return</span> ret;</div>
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno">  348</span>}</div>
</div>
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno">  349</span> </div>
<div class="ttc" id="aclasswheels_1_1rb_html"><div class="ttname"><a href="../../d1/db2/classwheels_1_1rb.html">wheels::rb</a></div><div class="ttdef"><b>定义</b> <a href="../../d4/da3/ringbuff_8hpp_source.html#l00025">ringbuff.hpp:26</a></div></div>
<div class="ttc" id="aclasswheels_1_1rb_html_a43fba1cafe0f21ade8ab93f284b84843"><div class="ttname"><a href="../../d1/db2/classwheels_1_1rb.html#a43fba1cafe0f21ade8ab93f284b84843">wheels::rb::emErrCode</a></div><div class="ttdeci">emErrCode</div><div class="ttdef"><b>定义</b> <a href="../../d4/da3/ringbuff_8hpp_source.html#l00028">ringbuff.hpp:28</a></div></div>
<div class="ttc" id="aclasswheels_1_1rb_html_a43fba1cafe0f21ade8ab93f284b84843adc8ce530ea6f636cb03be0af6e84ee0f"><div class="ttname"><a href="../../d1/db2/classwheels_1_1rb.html#a43fba1cafe0f21ade8ab93f284b84843adc8ce530ea6f636cb03be0af6e84ee0f">wheels::rb::ERR_ALLOC_MEM</a></div><div class="ttdeci">@ ERR_ALLOC_MEM</div><div class="ttdef"><b>定义</b> <a href="../../d4/da3/ringbuff_8hpp_source.html#l00029">ringbuff.hpp:29</a></div></div>
<div class="ttc" id="anamespacewheels_html"><div class="ttname"><a href="../../df/d8d/namespacewheels.html">wheels</a></div><div class="ttdoc">堆栈信息读取和保存记录</div><div class="ttdef"><b>定义</b> <a href="../../d3/df7/ary__str_8hpp_source.html#l00006">ary_str.hpp:7</a></div></div>
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